the preventive effectiveness of the individualized jade wind-barrier herbal tea bag on the common cold in elderly with qi-deficiency constitution (ccjwbt): a pragmatic randomized controlled trial

Conditions: Preventive Effectiveness; Elderly With Qi-deficiency Constitution; The Individualized Jade Wind-Barrier Herbal Tea Bag; Common Cold; Pragmatic Randomized Controlled Trial

Summary: objectives based on the individualized jade wind-barrier herbal tea bag intake after randomization, to evaluate the relationship of the individualized jade wind-barrier herbal tea bag intake and the improvement of qi-deficiency constitution on the common cold-associated outcomes. specific aims 1: to compare the incidence and recurrence of the common cold by the individualized jade wind-barrier herbal tea bag intake strategies (intake 3-month individualized jade wind-barrier herbal tea bag vs. no intake throughout the same trial period) in the hk qi-deficiency constitution elderly. specific aims 2: to determine the immunological index(es) and function changes by the intake strategies (intake 3-month individualized jade wind-barrier herbal tea bag vs. no intake throughout the same trial period) on the common cold among hk qi-deficiency constitution elderly. specific aims 3: to assess the change in the reductive ratio of the total scores of the clinical features of the qi-deficiency constitution questionnaire by the individualized jade wind-barrier herbal tea bag intake strategies (intake 3-month individualized jade wind-barrier herbal tea bag vs. no intake throughout the same trial period) in the hk qi-deficiency constitution elderly.


Eligibility criteria:
inclusion criteria: 1. aged 65 years old or above, 2. hk residents capable of consenting and have agreed to participate, 3. meet the assessment criteria of qi-deficiency constitution in tcmecq-c at screening, 4. the number of the incidence of the common cold ≥ 1 times/year, 5. able to intake the individualized jade wind-barrier herbal tea bag and complete the trial-related records/questionnaires and also withdraw blood. exclusion criteria: 1. not fulfilling the above inclusion criteria, 2. not assessed to be qi-deficiency constitution, 3. having serious mental and behavioral disorders that are unable to intake the individualized jade wind-barrier herbal tea bag, complete the trial-related records/questionnaires and withdraw blood, 4. having neurological disorders such as dementia etc. that are unable to intake the individualized jade wind-barrier herbal tea bag and complete the trial-related records/questionnaires and withdraw blood, 5. having serious diseases with undesirable conditions that are unable to intake the individualized jade wind-barrier herbal tea bag and complete the trial-related records/questionnaires and withdraw blood, 6. other conditions that are unable to intake the individualized jade wind-barrier herbal tea bag and complete the trial-related records/questionnaires and withdraw blood, 7. allergic to chinese herbal medicine (astragali radix (zhi huangqi), saposhnikoviae radix (fangfeng), atractylodes macrocephala koidz (baizhu), nelumbinis folium (heye), chrysanthemum morifolium ramat (juhua)), 8. taking chinese herbal medicine or drugs to manage their health problems within two weeks and cannot stop the treatment during the study, 9. have an abnormal liver and renal function analyzed results after randomization at screening.